dative bond

The @C01329@ bond formed upon interaction between molecular species, one of which serves as a donor and the other as an acceptor of the electron pair to be shared in the complex formed, e.g, the N-->B bond in H3N-->BH3. In spite of the analogy of dative bonds with covalent bonds, in that both types imply sharing a common electron pair between two vicinal atoms, the former are distinguished by their significant @P04710@, lesser strength, and greater length. The distinctive feature of dative bonds is that their minimum-energy rupture in the gas phase or in @I03026@ solvent follows the heterolytic bond cleavage path.
PAC, 1999, 71, 1919. (Glossary of terms used in theoretical organic chemistry) on page 1933 [Terms] [Paper]